Stoneworking machine



Patented Nov. 27, 1928.

JULIUS WEGNER, OF NEW YORK, N. Y.

stronnwon xmo MACHINE.

Application filed June 24,

machines and more particularly to the uni versal or turning heads hereof which generally comprise an upper stationary port-ion carrying the motor and associated elements, and a lower rotatably adjustable portion on which the revolving tool consisting, for iiistance, of a carborundum wheel at one end and a carborundum saw at the other end, is mounted with its co-operating elements. Adjustability of the rotatable lower section is desirable for the purpose of changing the position of the revolving tool relatively to the work whenever for any reason this may be required. For the purposes of efficient operation, it is necessary that the adjustment to the selected position may be accurately accomplished in a minimum of time and so that no vibration will be developed in the tool which would interfere with the proper operation thereof.

The object of the present invention is to provide a locking device whereby changesin the position of the rotatably adjustable section of the head may be quickly and efliciently accomplished, and whereby said section may be efficiently locked against undesirable vibration in a plurality of predetermined pc sitions.

Qther objects will appear from the description hereinafter, and the features of novelty will be pointed out in the claims.

In the ,accompanying drawings which show an example of the invention without defining its limits, Fig. 1 is an elevation illustrating the universal head of a conventional stone working machine, with parts in section and with the novel locking device embodied therein; Fig. 2 a fragmentary side elevation thereof; Fig. 3 is a. horizontal section approximately on the line '-33 of Fig. 2; Fig. 1 is an elevation looking at right angles to Fig. 2; and Figs. 5 and 6 are detail views of the locking mechanism.

As shown in F ig. 1, the head comprises an upper section 10 which is mounted in the machine of which it forms a part in any conventional manner so as to occupy a stationary position therein and carries the motor 11- whereby the revolving tool, to be referred to hereinafter, is operated. At-its lower end the section 10 is provided with a horizontal flange 12, located in surface engagement with a corresponding flange 13, forming part of the rotatable section 14. The flange 13 is maintained in surface engagement with the 1927. Serial No. 201,043.

flange 12, and the section 14 is rotatably connected with the section 10, by means of a washer 15, secured by. bolts 16 to a boss 17, forming an integral axial extension of the section 14 and projecting through anaxial opening 18 formed in the flange 12. 7 As shown in Fig. 1, the washer projects outwardly beyond the boss 17 so as to extend over the upper surface of the flange 12within the stationary section 10. The contacting faces of the flanges 12 and 13 are of'equal dimensions and are in the same plane, with the same axis and are provided-with oppositely beveled peripheral surfaces at and b, so as together to form a. circular body, the cross section ofwhich is in the form of a double wedge. The flanges 12 and 13 are.

surrounded by a clamping ring consisting of two sections 19 having an internal annular groove conforming to and fitting the wedgeshaped peripheries a and b of the flanges 12 and 13. The rotatably adjustable section 14 carries at its/lower end the revolving tool 20 which, as shown, mayconsist of a spindle upon the one end of which a carborundum wheel 21 is fixedand upon the other end of which a carborundum saw 22. is located. This revolving tool is operated by means of the motor 11 which is operatively connected therewith through the medium of a shaft and suitable mechanism of any conventional type which forms no part of the present invention, and accordingly is not illustrated. Thc aforesaid clamping ring 1919 is arranged so that its sections may be drawn together into clamping engagement with the flanges 12 and 13 and to be separated so as to relieve the'clamping effect thereof on said flanges 12"and 13. For this purpose the sections 19 of said clamping ring are provided respectively with a bearing 24, through which clamping bolts 25 extend loosely so as to be rotatable therein, and with bearings 26 internally screw threaded for receiving the serewthreaded ends of said bolts 25. In .order to bring about a coincidental operation of both bolts 25, the latter. areoperatively connected with each other by means of asprocket chain 27 and sprocket wheels 28 fixed upon the bolts. In addition to the sprocket'wheel 28, one bolt 25 also carries a gear wheel 29, arranged in" mesh with a pinion 3O fixed upon a control shaft'31, journaled in suitable bearings 32 upon the stationary section To facilitate the manual operation of the shaft 31 and to thereby facilitate the adjustment of the sections 19 of the clampin ring, a hand wheel 33 or its equivalent is fixed upon the shaft 31, as shown in Fig. 4.

It will be obvious with this arrangement that, as the hand wheel 33 is rotated in one direction or the other, the shaft 31 and pinion 30 will be correspondingly actuated to rotate the gear 29 and to thereby sii'nultaneously operate the clamping bolts through the medium ot-tlie sprocket chain 27 and sprocket wheels28 to-thereby bring about a separation or drawing together of the sections 19 of saidclamping ring. 7

At diametrically opposite points the stationary section 10 is provided with vertically arranged guide bearings 34, in which locking bolts 35 are freely slidable in vertical directions and the lower rotatably adjustable scction 14 is provided prefe ably upon its flange 13, with a plurality of sockets arranged'to be selectively brought into operative registry with the bolts 35 n ce-operating pairs for the purpose of fixing the lower section 14 in ad justed positions relatively to the section 10. For the purpose of quickly and ethciently op erating the locking bolts 35 to shift the same into and out of selected sockets v36, the following mechanism is provided: Each lockjing bolt 35 is pivotally connected at 37 with a lifting lever 38, pivoted at 39 upon a suitable portion of the stationary section of the head. The levers 38 at their free ends are "provided with inwardly'directed recesses or 'slots40, adapted to receive pins 41 carried by levers 42 fixed upon a shaft 43 which is journaled in suitable bearings 44 carried by the stationary section 10. The shaft 43 is op erated throughthe medium of gears 45 and '46, fixed respectively on the shafts 43 and 31, as shown in Figs. 2, 3 and 4 and thus is con- .trolled, in its operation. by the hand-wheel Withthe parts in the position shown in Figs. 1 to 5 inclusive, the locking bolts 35 are'i'n their operative positions and extend into a. pair of sockets 36 to thereby securely lock the revolving tool in the position indicated in Fig.1. lVhen it is desired to adjust the tool to a different position relatively to the work and to the stationary section 10, the hand wheel 33 is rotated in the direction of the arrowc in Fig. 2 to thereby correspondingly rotatethe shaft 31. The pinion and the gear wheel 29 are accordingly rotated correspondingly and the sprocket chain 27 and sprocket wheels 28 with the clamping bolts 25 are correspondingly. actuated in a three tion to separate the sections 19 of the clamping ring and to thereby relieve the flanges 12 and 13 from the clamping action thereof. At the same time the rotation of the shaft 31 will be transmitted by means of the pinions 46 and 45 to the shaft 43 and accordingly will adjust the levers 42 and the pins 41 there of in arcuate paths. This operation will finally cause the pins 41 to'enter the slots or recesses 40 and as the operation" continues,

to exert a lifting action upon the lifting levers 38, which is transmitted to the locking bolts and raises the latter out of the sockets 36 to the positionillustrated in Fig. 6. The

reverse rotation of the hand wheel 33 at this time will bring about a reverse movement of the levers 42 and the pins '41 thereof and will cause the latter to bear down upon the lower surface oi the slots and accordingly will more the levers 38 downwardly and thus force the locking bolts 35 into the sockets 36, which, in this adjustment, are in registry therewith. As the operation of the hand wheel 33 in this direction is continued, the clamping bolts 25 will finally be operated to draw together the two sections 19 of the clamping ring and to bring the latter back into clamping engagement with the flanges 12 and 13, whereby the'latter flange is securely fixed against further rotative. movement relatively to the flange 12.

The device is extremely simple in construction and efiicient in operation and makes it possible to quickly and efiiciently change the position of the revolving tool relatively to the work whenever this may be desired. At the same time the locking device serves to accurately fix the lower section 14 of the head in any selected position and permits no vibration tobe developed therein whichwould interfere with the work or with the proper operation of the revolving tool. Nhile the locking device hasbeen shown in combination with a stone working machine of spe cific construction,it will be understood that itis equally'adapted for use in connection with other types of stone working machines as well as with other machines which include a universal head consisting of relatively fixed and rotatably adjustable sections.

Various changes in the specific forms shown and described may be made with in the scope of the claims without departing from the spirit of the invention.

I claim: I

1. In a stone working machine, including a head, consisting of a relatively stationar section and a movable section rotatably adj ustable relatively thereto and carrying a tool. the combination of means for locking said movable section in a selected position, and mechanism having-positive movements in op po'site directions wherebv'said locking means may be adjusted to a locking position and to an'inoperative unlocking position and automatically retained inthe latter position at will. 7

2. In a stone working machine, including a head, consisting of a relatively stationary section and a movable section rotatably adjustable relatively thereto and carrying'a tool, the combination'of means for locking said movable section in a selected position,clamping means co-operating with said locking means to fix said movable section against movement, and mechanism COIDIDOD tO both the locking means-and clamping means for successively adjusting said locking means and clamping means to and from operative positions and vice versa. I r

3. In a stone working machine, including a head, consisting of a relatively stationary section and a movable section rotatably adjustable relatively thereto and carrying a tool, the combination of locking bolts slidably mounted upon the stationary section and adapted to engage the movable section to fix the same in a selected position, levers pivoted on said stationary section and pivotally connected 'ith said locking bolts, clamping means co-operating with said locking bolts to fix said movable section against movement, and adjusting mechanism common to said levers and said clamping means for successively operating said levers and clamping means to adjust said locking bolts and clamping means to and from their operative positions and vice versa. 7

4. In a stone working machine, including a head, consisting of a relatively stationary section and'a movable section rotatably adjustable relatively thereto and carrying a tool, the combination of locking bolts vertically slidable on said stationary section, said movable section being provided with a plurality of sockets adapted to register with said locking bolts, lifting levers pivotally mounted on said stationary section and pivotally connected with said locking bolts, lifting pins, and mechanism having positive move ments in opposite directions for adjusting said lifting pins in arcuate paths to raise and lower said lifting levers whereby said locking bolts are shifted into and out of registering sockets to thereby lock said movable section in selected positions, said locking bolts being automatically retained in their raised, inoperative positions by said adjusting mecha nism at will. I

In a stone working machine, including a head, consisting of a relatively stationary section and a movable section rotatably adjustable relatively thereto and carrying a tool, the combination of vertically slidable locking bolts mounted upon said stationary section, said movable section being provided with a plurality of sockets adapted to be selectively shifted into registry with said loc ing bolts, lifting levers pivotally mounted on said stationary section and pivotally connected with said locking bolts. said lifting levers being provided at their free ends with inwardly directed slots, a shaft, levers fixed ateflsaid clamping bolts to on said shaft, lifting pins carried by said levers, clamping means co-operating' with said locking bolts to fix said movable section against movement and'consisting of separable sections, clamping bolts operatively connected with said clamping sections, means for operating said shaftand said clamping bolts, whereby said lifting pins are shifted into the slots of said levers to raise and lower the same and to thereby raise and lower said locking bolts out of and into said sockets, said means being further arranged to operseparate and draw together the sections of said clamping means.

(5. In a stone working machine, including a head, consisting of a relatively stationary section and a movable section rotatably adjustable relatively thereto and carrying a tool, the combination of co-operating flanges on said two sections located in surface engagement with each other and provided with oppositely bevelled peripheries, a boss projecting from the flange of themovable section through an axial opening in the flange of the stationary section, a washer secured to said boss and projecting over the flange of said stationary section for connecting the movable section there- I with, a clamping ring consisting of two sections internally grooved to fit the bevelled peripheries of said flanges, clamping bolts carried by said clamping sections for drawing together and separating the same, a connection between said clamping bolts whereby the same are operated in unison, locking bolts vertically slidable on said stationary section, lifting levers pivoted on said stationary section and pivotally connected with said locking bolts, said levers at their free ends being provided with inwardly directed slots, :1 counter-shaft journaled on said stationary section. levers carried by said shaft, pins fixed on said levers, a main shaft, and gearing connecting said main shaft with said countershaft and with one of said clamping bolts whereby said pins are moved in circular paths into the slots of said levers to raise and lower the same and thereby move said locking bolts into and out of selected sockets and whereby said clamping bolts are operated to separate and draw together the sections of said clamping ring.

7. In a machine head, consisting of a relatively stationary section and a movable section rotatably adjustable relatively thereto, the combination of means for locking said movable section in a selected position, and mechanism having positive movements in opposite directions whereby said locking means may be adjusted to a locking position and to an inoperative, unlocking position and automatically held in the latter position at will.

8. In a machine head, consisting of a relatively stationary section and a movable section rotatably adjustable relatively thereto,

the combination of means for locking said movable section 1n a selected position, clamplng means co-operating wlth said locking means to fixsaid movable section against movement, and mechanism common to said locking means and clamping means for Suecessively adjusting said locking means and clamping means to and from operative positions and vice versa.

9. In a machine head, consisting of a relatively stationary section and a movable sec tion rotatably adjustable relatively thereto, the combination of locking bolts slidably mounted upon the stationary section and adapted to engage the movable section to [ix the same in a selected position, levers pivoted on said stationaryvsection and pivotally connected with said locking bolts, clamping means co-operating with said locking bolts to fix said movable section against movement, and adjusting mechanism common to said levers and clamping mechanism for successively operating said levers, and clamping mechanism to'adjust said locking bolts and clamping means to and from their operative positions andvice versa.

In testimony whereof I have hereunto set my hand.

JULIUS WEGNER. 

